NDLI: Limited feedback for multicarrier block fading channels: A rate distortion approach

Content Provider	IEEE Xplore Digital Library
Author	Agarwal, M. Dongning Guo Honig, M.L.
Copyright Year	2009
Description	Author affiliation: Department of Electrical Engineering and Computer Science, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA (Agarwal, M.; Dongning Guo; Honig, M.L.)
Abstract	This paper studies power loading in a multicarrier system with channel state feedback of no more than one bit per sub-channel. Full channel state information is assumed known at the receiver. A simple model with parallel two-state (good/bad) memoryless sub-channels is considered first, where feedback is used to select a given fraction of sub-channels to activate. The optimal feedback scheme is the solution to a vector quantization problem, the performance of which is characterized by a rate distortion function in the limit of infinite number of sub-channels. Bounds for performance loss with finite number of sub-channels are also developed. We then consider a second model of a bank of block Rayleigh fading sub-channels with total power constraint, where the feedback describes which sub-channels to activate with equal power. A scheme based on rate distortion code is proposed to describe which sub-channels exceed a threshold in signal-to-noise ratio and should be activated. With optimized threshold and moderate amount of feedback, the resulting capacity is known to be of the same order in the number of sub-channels as that achieved by water-filling with full channel state information at the transmitter. This scheme performs more favorably than alternative schemes based on channel state reduction (such as by grouping them) and subsequent entropy coding.
Starting Page	81
Ending Page	85
File Size	190806
Page Count	5
File Format	PDF
ISBN	9781424445356
DOI	10.1109/ITWNIT.2009.5158546
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-12
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Rate-distortion State feedback Channel state information Power system modeling Vector quantization Performance loss Rayleigh channels Signal to noise ratio Transmitters
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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